Red Hat Security Advisory: tigervnc security update
Multiple security vulnerabilities have been identified and addressed in TigerVNC and the X. Org X server components used in Red Hat Enterprise Linux 9. 4 Extended Update Support. These include denial of service, information disclosure, use-after-free leading to potential memory corruption, and incorrect permission issues affecting the xwayland and x0vncserver components. The vulnerabilities are fixed in updated TigerVNC packages provided by Red Hat. Users of affected Red Hat Enterprise Linux versions should apply the security update to mitigate these issues.
AI Analysis
Technical Summary
This advisory covers several vulnerabilities in TigerVNC and the X.Org X server's xwayland component as packaged in Red Hat Enterprise Linux 9.4 EUS. The issues include an integer underflow causing denial of service (CVE-2026-33999), multiple out-of-bounds reads leading to information disclosure and denial of service (CVE-2026-34000, CVE-2026-34002, CVE-2026-34003), a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001), and incorrect permissions in TigerVNC's x0vncserver allowing information disclosure, data manipulation, and denial of service (CVE-2026-34352). Red Hat has released updated packages to address these vulnerabilities.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions, information disclosure, data manipulation, and potential memory corruption on affected systems running TigerVNC and X.Org X server components. The issues affect remote display functionality and could disrupt service availability or compromise confidentiality and integrity of data handled by these components.
Mitigation Recommendations
Red Hat has released security updates for TigerVNC and related X.Org X server components in Red Hat Enterprise Linux 9.4 Extended Update Support. Users should apply these official updates as described in Red Hat advisory RHSA-2026:20575 to remediate the vulnerabilities. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the provided patches.
Red Hat Security Advisory: tigervnc security update
Description
Multiple security vulnerabilities have been identified and addressed in TigerVNC and the X. Org X server components used in Red Hat Enterprise Linux 9. 4 Extended Update Support. These include denial of service, information disclosure, use-after-free leading to potential memory corruption, and incorrect permission issues affecting the xwayland and x0vncserver components. The vulnerabilities are fixed in updated TigerVNC packages provided by Red Hat. Users of affected Red Hat Enterprise Linux versions should apply the security update to mitigate these issues.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers several vulnerabilities in TigerVNC and the X.Org X server's xwayland component as packaged in Red Hat Enterprise Linux 9.4 EUS. The issues include an integer underflow causing denial of service (CVE-2026-33999), multiple out-of-bounds reads leading to information disclosure and denial of service (CVE-2026-34000, CVE-2026-34002, CVE-2026-34003), a use-after-free vulnerability causing server crashes and potential memory corruption (CVE-2026-34001), and incorrect permissions in TigerVNC's x0vncserver allowing information disclosure, data manipulation, and denial of service (CVE-2026-34352). Red Hat has released updated packages to address these vulnerabilities.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions, information disclosure, data manipulation, and potential memory corruption on affected systems running TigerVNC and X.Org X server components. The issues affect remote display functionality and could disrupt service availability or compromise confidentiality and integrity of data handled by these components.
Mitigation Recommendations
Red Hat has released security updates for TigerVNC and related X.Org X server components in Red Hat Enterprise Linux 9.4 Extended Update Support. Users should apply these official updates as described in Red Hat advisory RHSA-2026:20575 to remediate the vulnerabilities. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the provided patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20575
- Cve Count
- 6
- Additional Cves
- ["CVE-2026-34000","CVE-2026-34001","CVE-2026-34002","CVE-2026-34003","CVE-2026-34352"]
- Cvss Version
- null
Threat ID: 6a160980e29bf47b5064cbda
Added to database: 5/26/2026, 8:58:40 PM
Last enriched: 5/26/2026, 10:26:50 PM
Last updated: 5/27/2026, 4:56:45 AM
Views: 2
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